Criminals tie a string to something sticky, lower it into the big blue boxes, and pull out mail. They’re usually looking for checks and
Easy to cure but we have simpletons running the PO.
Construct all boxes with a shelf below the slot,sloping so mail will slide down. Shelf edge with serrated teeth half inch or so long.
String pulls up the mail, string is between two teeth, mail raked off and drops back to the bottom.
And every PO should have a security camera aimed at the mail drop box.
You should send that to the post office. Great idea.
I like that idea. I’d suggest that the slot be made large enough to reach into, and then place very sharp, stiff wires so that letters would fall past the wires, but a hand reaching past would be pierced and couldn’t be pulled back. The mail thief could be collected at the regular pickup time, or he could gnaw his arm off for all I’d care.